Wireless sounder.



A. J. WILLIAMS.

WIRELESS SOUNDER.

APPLICATION mm MAYZI, 1915.

m wm Patented Mar. 27, 1917.

A. J. WILLIAMS.

WIRELESS SOUNDER. APPLICATIDNYFILED MAY 21, 1915.

Lmwwn Patented Ma1u27,1917.

2 SHEETS-SHEET 2.

I a Q2- 6 .ZZ when z't'may concern: Beit' known that I, ARCHIE J.lViLLLnrs, ti zen of the United States. residing, at gtonjin the countyof Kenton and nd useful Improvements in lVireless Soundersand I dohereby declare the followin ght e full, clear, and exact descripti o theinvention, such will enable others. skilled ,inlthe arttowhich itappertains tofniakeand use the same.-

flhis invention relates to-new and useful improvements in wirelesssounders, and has for its principal object to provide a sounder whereinthe magnets are adjustable with relation to the diaphragms.

Another object of the invention is to pro videsounderin which a delicateadj ust- Inent may be easily and quickly made.

2o TIA fiurtlieribject of the invention is to provide a -sounder whichwill remain stationary with the remainder-of the instrui'i'ients, thusdoing away with the necessity of using a head receiver and the like.

.Still anotherobject of the invention is to provide a device which maybe used for receivingover long distances for operatingthroughinterfering stations, and to provide a devicewhich may be tunedfor close work. so ,With theseand other objects in view, the inventionconsists in the novel combination and arrangement of parts which will befully set forth in the following specification and accompanyingdrawings, in which. Figure 1 is a front view inelevation of a sounderconstructed in accordance with this invention I Fig. 2.is a horizontalsectional view taken on line-22 of Fig-1, I

.Fig. 3 is a vertical sectional view through the center of Fig. 1, v t

Fig. 4 is a front view in elevation of the sounder showing the diaphragmremoved, Fig. 5 is a horizontal sectional view taken on line 5.5 of Fig.4;, and

' Fig. 6 is awiring diagram of the device. Referringto the drawings bycharacters cit-reference, the numeral 1 designates as an entirety the"sounder comprising a casing which is formed of the bottom 2,having-extending upwardly therefrom the rear wall 8. Suitable side wallsl are secured to the loottom'and to the rear wall and the upper edges ofthese side walls are connected by the top 5. Formed centrally of therear wall Specification of Letters Patient.

is a suitable opening 6 for f Kentucky, fhave invented certain s rirn rsic. Anemia ai-wrnLili s, on oov iivetron, KENTUCKY. I

- Wraniznss Ysounnnia.

. Patented Mar. 27,191'2.

a Application filed May 21, 1915. Serial No. 29,543.

the reception of the internally screw threaded sleeve 7, the use ofwhich will appear as the description proceeds. A suitable framedesignated gen erally by the numeral 8, comprising the top, bottom, andsides 9, 10, and 11., respectively, is-secured to the front edgesof thetop and side walls, and the lower edge'of this frame rests on the baseas clearly shown in Fig. 3; A suitable groove 12 is formed in each ofthe members 9,10. and. 11 forming the frame 8 and the diaphragm 13 isheld in place by the walls of the groove 12. A suitable bracket itcimiprisingthe vertical portion 15, having formed at its upper end thehorizontal arm 16, issecured tothe rear wall 3, and the horizontal armterminates at its outer end in the vertically extending sleeve or loop17 which acts as a guide for the magnet-adjusting stem which will. bemore fully hereinafter. described." Cooperating with the bracket 14 inholding the magnets is a suitable transversely. extending bar 18 whichis secured to the. side walls and extends entirely' across the casing lnear the open ends thereof. f

.T he magnets, designated generally by the muneral 19, comprise thecores 20 of steel or a similar easily excited metal, which cores aresupported on the bar 21 having formed centrally a collar 22' by means ofwhich the adjusting stem connected thereto.' Surrounding each of thecores 20 is a suitable coil of magnet wire which may be wound to anysuitable resistance,'but in the present: device as illustratech these:magnets are wound to a resistance of three thousand ohms.

bar 21 is the adjusting stem 21L which is screw threaded as at 25 andprovided at'its opposite end with the head 26 which is prefe'ablyknurled or milled to provide a finger grip. The threads 25 arearranged to engage the threads on the inner side of the sleeve 7 andsurrounding the sleeve and bearing against the head-and the rear all 3of the casing 1 is a suitable coil spring 27. This coil spring isarranged to frictionally engage the head 26 and the rear wall 8 to holdthe head againstaccidental turning. The magnets 23 are supported on thebar 18; While the adjusting stem 24: is supported in the bracket 17 andin the sleeve 7. Both the magnets and the adjusting stem. are airSwivelly connected to'the collar 22 of the provided the binding postsAand B, and

each binding post in each'setis given a designation. for the sake of'clearness in the description. The binding post designated by thenumeral 29' in the set A is'connected by means of theiwire 30 to oneterminal of the.

magnet, While the' opposite terminal" of' the magnet is connectedby-means of the Wire 31tothe binding post 32 of the set A. Confinectedto the binding post 29 is a suitable Wire 33, .the opposite terminal Of'WhlCh is connected 'to the binding'post 34 in set B,

j and connected to this binding post 34 -is the wire 35; the'oppositeterminal of which is f connected to oneterminal of'the condenser" 28 asat 36. The opposite, terminal'37 of the condenser is connected by meansofthe' wire 38'to the binding post 39 in set B, and

. this binding post is connected by means of the wire 40 tothe bindingpost 32., It will 30' binding posts isvused, the current will -flowthrough the magnets and the condenser will thus be seen that regardlessof which set of bridge the terminals of the magnets.

It will be apparent from the foregoing -that in use variousadjustments-of the mag nets with-relation to the diaphragm may be madeby turning the thumb screw 26. This will cause the magnetsto, movetoward 01' be moved away from the=diaphragm, and in view of, the factthat it is a screw ads 'jUstment, it-will be evident that very delicateadjustments may be made. .It 1s also, evident that due to the frictionalcontact ofv I the spring 27 against the thumb screw 26;

danger of the magnets being accidentally moved either toward oraway fromthe diaphragm and the destroying of the "adjustment s iseliminated'."

,. While in the foregoing there has: been shown and described thepreferred embodi- .ment of this invention, it is to be understood thatsuch changes may be-made in the combination and arrangement of parts as-In testimony whereof I aflis 'sig na will fall within the spirit andscope of the invention as claimed. What is claimed is: a 1. Awirelessreceiving apparatus including a casing, adiaph'rag'm-"forming the frontwall of said casing the rear wall of said casingbeing centrallyapertured, an inter 6Q nally threaded sleeve seated in said aperture; astem threaded through said sleeve, :1 thumb piece atthe outerend'ofsaidstem",;a head at the inner-end of the stem, magnets within :the casing,thesaid head being swivelly 0011- Q5 nected tothe magnets whereby uponturning of the-thun1b piece the. magnets may be adjusted toward or awayfrom! the 'di'nphragln and a horizontal supporting bur extendingtransversely of the casing beneath the magnets for holding said. magnetsin proper position; I

2. A wireless telegraph apparatus com? prising a'ca'sin'gya dla'phragmformingjhe front wall of said casing, the rear wall of- 16 said casingbeing providedw-i'th' a central opening, a sleeve having internal screwthreads extending through said openings, a

stem" threaded through the sleeve; :1. thumb piece at the outer-end ofsaid stem, a com- 'pressio'n coil spring surrounding the' s teln and theoutwardly rojecting portion of the sleeve, sald spring iting against thethumb "piece. andthe outer. side-of the rear wall of i thecasin'g-to-h'0ld.the stem in-various athjusted positions, a head at the inner..endf'of the stem a pair of magnets within the easing' the head bengswivel1y-connected tp --the magnets whereb upon turning of the stem.the' magnets -w1l1'be moved toward or to away'yfrom the dia hra'gm, ahorizontal supporting bar exten ing transversely throufgb the casing inthe rear of the diaphragmor providing a 'supp'orting'.-means for the magnetsthroughout their length of travel,- a bracket. attached to theinner-side of'the rear wall 0f the casing and stp'air'of up- '-warc llvextending arcuate arms partially em-. bracing the stem and form ng asnpportfor' the inner. end thereof. 190

ture in presence of two witnesses.

- a ARCHIE J-. WILLIAMS. ll litnesses:

